Example Python program TKInterLiveClock_0.py

Modules

• from Tkinter import * # Python 2

• from tkinter import * # Python 3

• import datetime
• import threading

Classes

• class Clock(Frame):

Methods

• def init(self, master):
• def start(self):
• def stop(self):
• def update(self):

Code

Python tkinter example

from Tkinter import *  # Python 2
# from tkinter import *  # Python 3


import datetime
import threading

class Clock(Frame):
    def __init__(self, master):
        Frame.__init__(self, master)

        self.updating = BooleanVar()

        self.ValueHour = IntVar()
        self.LabelHour = Label(self)
        self.LabelHour.grid(row=0, column=0)
        self.LabelHourUpdate = Label(self, textvariable=self.ValueHour)
        self.LabelHourUpdate.grid(row=0, column=1)

        self.ValueMinute = IntVar()
        self.LabelMinute = Label(self)
        self.LabelMinute.grid(row=1, column=0)
        self.LabelMinuteUpdate = Label(self, textvariable=self.ValueMinute)
        self.LabelMinuteUpdate.grid(row=1, column=1)

        self.ValueSecond = IntVar()
        self.LabelSecond = Label(self)
        self.LabelSecond.grid(row=2, column=0)
        self.LabelSecondUpdate = Label(self, textvariable=self.ValueSecond)
        self.LabelSecondUpdate.grid(row=2, column=1)

        self.btn_start = Button(self, text="Start", command=self.start)
        self.btn_start.grid(row=3, column=0)

        self.btn_stop = Button(self, text="Stop", command=self.stop)
        self.btn_stop.grid(row=3, column=1)

    def start(self):
        if not self.updating.get():
            self.updating.set(True)
            self.new_thread = threading.Thread(target=self.update)
            self.new_thread.start()

    def stop(self):
        self.updating.set(False)

    def update(self):
        while self.updating.get():
            now = datetime.datetime.now()
            self.ValueHour.set(now.hour)
            self.ValueMinute.set(now.minute)
            self.ValueSecond.set(now.second)

root = Tk()
clock = Clock(root)
clock.pack()
root.mainloop()

Useful Links

• Articles: https://python-commandments.org/
• Python shell: https://bsdnerds.org/learn-python/
• Tutorial: https://pythonprogramminglanguage.com/